无法更改Firefox中的设置？无法在Firefox中保存主页？它不记得密码吗？很多时候，当您尝试更改Firefox中的设置时，它不会保存。Firefox提供了大量的自定义功能，可以将Firefox个性化为最适合您的方式。如果这没有发生，请查看我们的指南，该指南将帮助您解决这些问题。

Firefox不会保存密码或设置

就在我们开始分享修复之前，如果没有任何效果，最糟糕的是刷新 Firefox^{(Refresh Firefox)}。这是解决Firefox中所有问题的关键。在本指南中，我们将介绍以下场景：

1. 无法将Firefox设置为默认浏览器：
2. Firefox无法保存首选项
3. Firefox无法保存对工具栏和窗口大小的更改
4. Firefox无法保存用户名和密码
5. Firefox 无法^{(Firefox Unable)}下载或保存文件
6. Firefox不保存 Web 表单条目
7. 恢复丢失或丢失的书签

1]无法将Firefox设置为默认浏览器

当您计算机上安装的另一个浏览器被设置为默认浏览器时，通常会发生这种情况。当您启动另一个浏览器时，它会询问您是否要将其设置为默认浏览器。假设您说是，当您打开链接时，它会在其他浏览器中打开。

因此，解决此问题的最佳方法是确保您首先将Firefox再次设置为默认浏览器^{(as the default browser)}。接下来，打开另一个浏览器，如果弹出，请选中“不要再问我这个”框。如果您安装了多个浏览器，请确保对所有浏览器重复此操作。

2] Firefox无法保存首选项

这通常发生在首选项文件（Firefox记录所有设置的地方）被锁定或损坏时。在这两种情况下，您所做的任何更改都不会被保存。

锁定或损坏的首选项文件^{(Locked or Corrupted Preferences File)}

用于保存所有首选项的文件是 prefs.js。当您进行更改时，它会创建一个副本“prefs.js.moztmp”，并首先将所有内容保存在那里。在此之后，所有更改都将复制回原始文件。prefs.js可能被锁定，并且更改未传输。

• 退出火狐
• 打开Firefox 配置文件文件夹^{(Firefox Profile folder)}
• 找到prefs.js文件和prefs.js.moztmp （如果有）。
• 右键单击每个文件 >Properties > Check文件是否在属性下处于只读 模式^{(Read-only mode)}。^{(Attributes.)}
• 如果是，应该有更多的 pref.js 文件但带有数字，例如 prefs-2.js、prefs-3.js 等等。
• 删除^(Delete)它们，并删除Invalidprefs.js（如果存在）。
• 重启火狐。
• 您现在应该能够保存首选项。

这同样适用于损坏的首选项文件，只是您不需要检查其读取模式。只需^(Just)打开配置文件文件夹，然后删除 pref.js 文件。

这将删除您对许多扩展程序的所有自定义设置和设置。

3] Firefox无法保存对工具栏和窗口大小的更改

就像首选项一样，Firefox将工具栏和窗口大小更改保存到xulstore.json文件中。我们也必须删除这个文件。

• 退出火狐
• 打开 Firefox 配置文件文件夹
• 找到^(Locate)并删除文件 xulstore.json
• 关闭 Windows 资源管理器，然后重新启动Firefox。

您可以通过重命名文件来保留文件的备份。

4] Firefox无法保存用户名和密码

Firefox带有一个密码管理器^{(Password Manager)}，可以在多台计算机之间同步。虽然它默认设置为记住密码。您可能禁用了此功能或告诉Firefox永远不要记住特定站点的密码

启用密码保存功能^{(Enable Password Saving Feature)}

• 在地址栏中输入 about:preferences，然后按回车键。
• 单击^(Click)左侧边栏上的锁定图标以打开^(Lock)隐私^(Privacy)部分。
• 滚动查找 登录名和密码^{(Logins & Passwords)}
  • 勾选^(Tick)“要求^(Ask)保存网站的登录名和密码”复选框。
  • 单击^(Click)Exceptions，如果列出了网站，请将其删除。
• 关闭此选项卡。现在密码保存功能将起作用。

私人浏览^{(Private Browsing)}

为了确保您不被跟踪，此模式还确保没有用户名和密码被保存。因此，请检查您是否正在使用它。在这种模式下，寻找一个看起来像戴眼镜的人的图标。

但是，如果这是您每次看到的内容，则意味着您处于永久隐私浏览模式^{(permanent Private Browsing mode)}。

• 在地址栏中，输入 about:preferences 并按 Enter。
• 切换到隐私部分，然后转到历史^(History)部分。
• 单击^(Click)下拉菜单，然后选择“使用历史记录的自定义设置”，然后进行更改
  • 取消选中^(Uncheck)始终隐私浏览模式。
• 关闭，然后再次打开 Firefox。

使用第三方密码管理器^{(Using a third-party password manager)}

您的浏览器上可能安装了第三方密码管理器，它可以完成所有工作。您现在可能没有使用它，但是当您安装它时，它已经禁用了Firefox的保存密码功能。我们建议您卸载该密码管理器。

5] Firefox 无法^{(Firefox Unable)}下载或保存文件

重置下载文件夹

• 在地址栏中，输入 about: config 并按 Enter。
• 在搜索字段中键入 browser.download，然后按 Enter。^{(browser.download, )}它将为您揭示很多设置。
• 注意^(Notice)如果以下任何设置的状态为已 修改。^(modified.)您可以通过右键单击将它们重置为默认值，然后从上下文菜单中选择重置。^(Reset)确保^(Make)重置以下内容
  • browser.download.dir
  • browser.download.downloadDir
  • browser.download.folderList
  • browser.download.lastDir
  • browser.download.useDownloadDir

重置^(Reset)所有文件类型的下载操作

通常，Firefox会下载所有类型的文件。如果某些文件类型已设置为以不同方式处理，则下载有时无法完成。最好将文件处理重置为默认值。

• 退出 Firefox^{(Quit Firefox)}并打开Firefox Profile Folder。
• 删除^(Delete)或重命名 handlers.json 文件
• 重启火狐。

检查互联网安全软件^{(Internet Security Software)}

Firefox尊重您在计算机上安装的Internet安全软件配置的任何设置。如果设置阻止文件下载，那么您需要更改它。如果您在计算机上看到大量取消的下载，您可以理解。

6] Firefox不保存 Web 表单条目

所有浏览器都支持自动填充功能。当您需要多次填写表格中的常用条目时，它们非常有用。因此，如果您输入了您的姓名、地址、电子邮件 ID、电话号码，Firefox可以记住并在下次自动填写。如果您不再能够自动填写表单，请按照以下步骤操作。

• 在地址栏中，输入 about:preferences 并按 Enter。
• 切换到隐私部分，然后转到历史^(History)部分。
• 单击^(Click)下拉菜单，然后选择“使用历史记录的自定义设置”，然后进行更改
  • 取消选中^(Uncheck)始终隐私浏览模式。
  • 选中记住^{(Check Remember)}浏览、下载、搜索和表单历史记录。
  • 取消选中Firefox^(Firefox)退出时清除历史记录。

7]恢复丢失^{(Recover Lost)}或丢失^(Missing)的书签

有时书签^(Bookmarks)会丢失，有趣的是大多数时候，工具栏不存在。因此，请查看如何恢复丢失或丢失的书签。 ^{(how you can recover lost or missing bookmarks. )}

本指南涵盖了大多数情况，以及当Firefox^(Firefox)无法保存设置或记住信息时您通常会遇到的解决方案。如果您面临其他情况，请在评论中告诉我们。

类似的读法：^{(Similar reads:)}

• Edge不记得密码^{(Edge not remembering passwords)}
• 谷歌浏览器不保存密码。

Firefox won't save passwords, settings or remember information

Can’t change a sеtting in Firefox? Can’t save thе homepage in Firefox? Does it not remember passwords? Many a time whеn you try to change settings in Firеfox, it won’t save. Firefox offers a plethora of customization to personalize Firefox to what it suits you best. If that doesn’t happen, check our guide which will help you fix these issues.

Firefox won’t save passwords or  settings

Just before we start sharing the fixes, if nothing works, Refresh Firefox at the worst. It’s key to fixing all the problems in Firefox. In this guide we are covering these scenarios:

1. Unable to set Firefox as default browser:
2. Firefox not able to save Preferences
3. Firefox unable to save changes to toolbars and window sizes
4. Firefox unable to save usernames and passwords
5. Firefox Unable to download or save files
6. Firefox doesn’t save web form entries
7. Recover Lost or Missing Bookmarks

1] Unable to set Firefox as the default browser

This usually happens when another browser installed on your computer is set as the default browser. When you launch the other browser, it will ask you if you want to set it as the default browser. Let’s say you say yes, and when you open a link, it opens in some other browser.

So the best way to resolve this to make sure you first set Firefox, again, as the default browser. Next, open the other browser, and it if pops up, check the box which says “Don’t ask me this again”. if you have multiple browsers installed, make sure to repeat this for all of them.

2] Firefox not able to save Preferences

This usually happens when either the preference file (where Firefox keeps a note of all settings) is locked or is corrupt. In both cases, any changes you make will not be saved.

Locked or Corrupted Preferences File

The file used to save all preferences is the prefs.js. When you make a change, it creates a copy “prefs.js.moztmp”, and first saves everything there. After this, all the changes are copied back to the original file. It is possible that the prefs.jsis locked, and changes are not transferred.

• Quit Firefox
• Open the Firefox Profile folder
• Locate the prefs.js file, and prefs.js.moztmp if available.
• Right-click on each file > Properties > Check if the files are in Read-only mode under Attributes.
• If yes, there should be more of the pref.js file but with numbers, e.g., prefs-2.js, prefs-3.js and so on.
• Delete them, and also delete Invalidprefs.js, if it exists.
• Restart Firefox.
• You should now be able to save preferences.

The same applies to corrupted preference file as well, except that you don’t need to check about its read mode. Just open the profile folder, and delete the pref.js file.

This will remove all your custom settings and settings for many extensions.

3] Firefox unable to save changes to toolbars and window sizes

Just like preferences, Firefox saves toolbar and windows size changes into the xulstore.json file. We will have to delete this file as well.

• Quit Firefox
• Open the Firefox Profile folder
• Locate and delete the file xulstore.json
• Close windows explorer, and then relaunch Firefox.

You can keep a backup of the file by renaming it.

4] Firefox unable to save usernames and passwords

Firefox comes with a Password Manager which can sync across multiple computers. While it is set to remember passwords by default. you may have disabled this feature or told Firefox to never remember passwords for a particular site

Enable Password Saving Feature

• Type about: preferences in the address bar, and hit the return key.
• Click on the Lock icon on the left sidebar to open Privacy section.
• Scroll to find Logins & Passwords
  • Tick the checkbox which says “Ask to save logins and passwords for websites.”
  • Click on Exceptions, and if there is a website listed, remove it.
• Close this tab. Now password saving feature will work.

Private Browsing

Built to make sure you are not tracked, this mode also makes sure no username, and password is saved. So check if you are using it. When it this mode, look for an icon which looks like someone wearing glasses.

However, if this is what is you see every time, it means you are into permanent Private Browsing mode.

• In the address bar, type about: preferences and pressEnter.
• Switch to the privacy section, and go to the History section.
• Click on the dropdown, and select “Use custom settings for History”, and make the changes
  • Uncheck always private browsing mode.
• Close, and open Firefox again.

Using a third-party password manager

It is possible that there is a third party password manager installed on your browser, and it’s doing all the job. You might not be using it now, but when you installed it, it has disabled saving password feature of Firefox. We recommend you to uninstall that password manager.

5] Firefox Unable to download or save files

Reset the download folder

• In the address bar, type about: config and press Enter.
• Type browser.download, in the search field and hit enter. It will reveal a lot of settings for you.
• Notice If any of the following settings have a status of modified. You can reset them to default with a right-click and choose Reset from the context menu. Make sure to reset the following
  • browser.download.dir
  • browser.download.downloadDir
  • browser.download.folderList
  • browser.download.lastDir
  • browser.download.useDownloadDir

Reset download actions for all file types

Usually, Firefox downloads all types of files. In case certain files types have been set to handle differently, then the downloads sometimes don’t complete. It is best to reset file handling to default.

• Quit Firefox and open Firefox Profile Folder.
• Delete or rename the handlers.json file
• Restart Firefox.

Check with Internet Security Software

Firefox honors any setting that has been configured by the Internet security software you have installed on your computer. If the settings are such that it blocks file downloads, then you need to change it. You can understand if you see a lot of canceled downloads on your computer.

6] Firefox doesn’t save web form entries

All browsers support the auto-fill feature. They are very helpful when you need to fill in common entries in the form many a time. So if you have entered your name, address, email id, phone number, Firefox can remember and auto-fill it next time. If you’re no longer able to auto-fill your forms, follow these steps.

• In the address bar, type about: preferences and press Enter.
• Switch to the privacy section, and go to the History section.
• Click on the dropdown, and select “Use custom settings for History”, and make the changes
  • Uncheck always private browsing mode.
  • Check Remember browsing, download, search and form history.
  • Uncheck Clear history when Firefox exits.

7] Recover Lost or Missing Bookmarks

Sometimes Bookmarks go missing, and the funny part is that most of the time, the toolbar is not there. So check out how you can recover lost or missing bookmarks. 

This guide covers most of the scenarios, and solutions you will usually face when Firefox won’t save settings or remember information. If you are facing a situation other than this, let us know in the comments.

Similar reads:

• Edge not remembering passwords
• Google Chrome not saving passwords.

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